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US9950911B2 - Adjustable wear pad assembly for a telescopic boom - Google Patents

Adjustable wear pad assembly for a telescopic boom Download PDF

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Publication number
US9950911B2
US9950911B2 US14/894,603 US201414894603A US9950911B2 US 9950911 B2 US9950911 B2 US 9950911B2 US 201414894603 A US201414894603 A US 201414894603A US 9950911 B2 US9950911 B2 US 9950911B2
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Prior art keywords
wear pad
boom
stud
plate
secured
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US14/894,603
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US20160130119A1 (en
Inventor
Adolfo Fortunato
Emanuele Simonetti
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CNH Industrial Italia SpA
Blue Leaf IP Inc
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CNH Industrial America LLC
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Publication of US20160130119A1 publication Critical patent/US20160130119A1/en
Assigned to CNH INDUSTRIAL ITALIA S.P.A. reassignment CNH INDUSTRIAL ITALIA S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIMONETTI, Emanuele, FORTUNATO, Adolfo
Assigned to CNH INDUSTRIAL AMERICA LLC reassignment CNH INDUSTRIAL AMERICA LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CNH INDUSTRIAL ITALIA SPA.
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Publication of US9950911B2 publication Critical patent/US9950911B2/en
Assigned to BLUE LEAF I.P., INC. reassignment BLUE LEAF I.P., INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CNH INDUSTRIAL AMERICA LLC
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting

Definitions

  • the present invention relates to an adjustable wear pad assembly for a telescopic boom.
  • the sections of a telescopic boom are required to slide axially relative to one another smoothly while at the same time not moving relative to one in a transverse direction.
  • wear pads made of a suitable material such as nylon, are placed between the sections at the front and rear axial end of each section.
  • FIG. 1 is a section through two overlapping sections 12 and 14 of a telescopic boom 10 , the inner section 14 being supported by means of four conventional wear pads assemblies.
  • FIG. 2 shows a plan view of a mounting plate 18 of one of the wear pad assemblies in FIG. 1 .
  • Each mounting plate 18 shown in plan in FIG. 2 , is itself bolted to the outer section 12 of the boom 10 by means of four bolts 20 and a fifth longer bolt 22 passes through the mounting plate 18 and a shim or spacer 24 , which is shown in plan in FIG. 3 , to engage within a threaded insert 26 in a wear pad 16 , the latter being shown in plan in FIG. 4 .
  • the wear pad 16 is in this way clamped to mounting plate 18 and the thickness of the spacer or shim 24 is selected to ensure that the inner surface of the wear pad 16 contacts the outer surface of the inner section 14 to take up the clearance between the two sections 12 and 14 while allowing them to slide smoothly relative to one another.
  • a wear pad assembly for mounting between an inner and an outer section of a telescopic boom, comprising a wear pad having a first side for contacting an outer wall of the inner section of the boom, and a second side facing an inner wall of the outer section of the boom, wherein at least one rigid plate is secured to the second side of the wear pad so as not to be movable relative to the wear pad, and a stud in screw-threaded engagement with the outer section of the boom or a plate secured to the outer section of the boom is associated with each rigid plate, the end of stud and the associated rigid plate having mating formations to enable the stud to urge the first surface of the wear pad against the outer wall of the inner section of the boom while preventing the wear pad from being displaced in a plane normal to the axis of rotation of the stud.
  • Each rigid plate serves to apply a compressive force evenly over the surface of the wear pad in contact with the inner section of the boom as well as to withstand the shear forces on the wear pad as the sections of the boom slide relative to one another.
  • Each rigid plate may be bonded in any suitable manner to the second side of the wear pad but to simplify manufacture it may conveniently be an interference fit in a recess formed in the second side of the wear pad.
  • the mating formations comprise a circular hole in the rigid plate and a cylindrical spigot, or dog, on the end of the stud.
  • the area of the first side of the wear pad capable of contacting the outer surface of the inner section of the boom is substantially equal to the area bounded by the lateral edges of the wear pad.
  • the contact surface of the wear pad of a preferred embodiment of the invention is continuous, thereby allowing a greater load bearing surface area for a given circumference.
  • a wear pad for use in an assembly comprising a body of plastics material having oppositely facing sides, wherein one side is continuous and at least one rigid plate is secured to the oppositely facing side of the body, the rigid plate being formed with a formation capable of interacting with a screw threaded stud to prevent the wear pad from moving in a plane normal to the axis of the stud.
  • two rigid plates are secured to the oppositely facing side of the body and each is secured to the body by being an interference fit in a respective recess formed in the oppositely facing side of the body.
  • FIG. 1 is, as earlier described, a section through a boom fitted with four known wear pad assemblies
  • FIGS. 2, 3 and 4 are, as previously described, plan views of a mounting plate, a shim and a wear pad, respectively, of one of the wear pad assemblies shown in FIG. 1 ,
  • FIG. 5 is a view similar to that of FIG. 1 showing an embodiment of the invention.
  • FIG. 6 is an exploded view of the wear pad employed in the embodiment of FIG. 6 .
  • each wear pad assembly comprises a wear pad 116 as shown in exploded view in FIG. 6 .
  • Each wear pad 116 comprises a body 116 a made of a suitable material, such as nylon, having a hardness lower than that of the inner section 14 of the boom 10 .
  • the body 116 a has a first surface 116 b facing the inner section 14 and a second surface 116 c facing the outer section 12 .
  • the first surface 116 b is a flat continuous surface while the second surface 116 c is formed with two circular recesses 116 d each of which received a respective rigid plate 118 having central cylindrical hole 119 .
  • the rigid plates 118 are secured to the body 116 by virtue of being an interference fit in the recesses 116 d.
  • Two studs 120 are screw threaded into the outer section 12 of the boom in alignment with the holes 119 in the rigid plates 118 .
  • the studs 120 may be screwed into a mounting plate, similar to the previously described mounting plate 18 that is itself secured to the outer section 12 of the boom 10 .
  • the ends of the studs 120 are formed with a cylindrical spigot 121 , or dog, that fits within, and is free to rotate relative to, the hole 119 in the rigid plate 118 .
  • Each stud 120 is formed with a non-circular recess 125 , to receive a drive implement, such as an Allen key, to apply torque to the stud.
  • the stud can be turned to urge the wear pad 116 against the outer surface of the inner section 14 of the boom 10 .
  • the stud is prevented from rotating by tightening a lock nut 122 against the outer surface of the outer section 12 of the boom 10 .
  • a washer 124 is inserted between the lock nut 122 and the outer section 12 of the boom.
  • the assemblies described by reference to FIGS. 5 and 6 are adjustable without the need for them to be dismantled, without the need to stock shims of different of sizes and without the need for special equipment to take up the weight of the inner section as shims are being added or replaced. This makes for easier installation and maintenance thereby also reducing cost.
  • a further advantage is that a larger area of the wear pad is in contact with outer surface of the inner section of the boom providing better support and longer lasting wear pads.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A wear pad assembly for a telescopic boom includes a wear pad having a first side for contacting an outer wall of an inner section of the boom, and a second side facing an inner wall of an outer section of the boom. At least one rigid plate is secured to the second side of the wear pad, and a stud in screw-threaded engagement with the outer section of the boom or a plate secured to the outer section of the boom is associated with each rigid plate, the end of stud and the associated rigid plate having mating formations to enable the stud to urge the first surface of the wear pad against the outer wall of the inner section while preventing the wear pad from being displaced in a plane normal to the axis of rotation of the stud.

Description

This application is the US National Stage filing of International Application Serial No. PCT/EP2014/061282 filed on May 30, 2014 which claims priority to Italian Application MO2013A000158 filed May 31, 2013, each of which is incorporated herein by reference in its entirety.
FIELD OF THE INVENTION
The present invention relates to an adjustable wear pad assembly for a telescopic boom.
BACKGROUND OF THE INVENTION
The sections of a telescopic boom are required to slide axially relative to one another smoothly while at the same time not moving relative to one in a transverse direction. To reduce friction and to take up unavoidable gaps between the sections, wear pads made of a suitable material such as nylon, are placed between the sections at the front and rear axial end of each section.
A known design of wear pad assembly is shown in FIGS. 1 to 4 of the accompanying drawings. FIG. 1 is a section through two overlapping sections 12 and 14 of a telescopic boom 10, the inner section 14 being supported by means of four conventional wear pads assemblies. FIG. 2 shows a plan view of a mounting plate 18 of one of the wear pad assemblies in FIG. 1. Each mounting plate 18, shown in plan in FIG. 2, is itself bolted to the outer section 12 of the boom 10 by means of four bolts 20 and a fifth longer bolt 22 passes through the mounting plate 18 and a shim or spacer 24, which is shown in plan in FIG. 3, to engage within a threaded insert 26 in a wear pad 16, the latter being shown in plan in FIG. 4. The wear pad 16 is in this way clamped to mounting plate 18 and the thickness of the spacer or shim 24 is selected to ensure that the inner surface of the wear pad 16 contacts the outer surface of the inner section 14 to take up the clearance between the two sections 12 and 14 while allowing them to slide smoothly relative to one another.
Because of the accumulation of tolerances, one cannot dimension a wear pad to fit precisely in all locations and instead shims of different thickness are required at the different locations. This creates a requirement for many different parts and complicates assembly. Furthermore, as the pads 16 wear down, the clearance cannot be adjusted without dismantling the wear pad assemblies and replacing the shims 24. A still further disadvantage stems from the fact that only the surface area of the wear pad surrounding the insert 26 can be used to engage the outer surface of the inner section 14 of the boom 10, necessitating the use of larger wear pads 16.
SUMMARY OF THE INVENTION
With a view to mitigating at least some of the foregoing disadvantages, there is provided in accordance with the present invention a wear pad assembly for mounting between an inner and an outer section of a telescopic boom, comprising a wear pad having a first side for contacting an outer wall of the inner section of the boom, and a second side facing an inner wall of the outer section of the boom, wherein at least one rigid plate is secured to the second side of the wear pad so as not to be movable relative to the wear pad, and a stud in screw-threaded engagement with the outer section of the boom or a plate secured to the outer section of the boom is associated with each rigid plate, the end of stud and the associated rigid plate having mating formations to enable the stud to urge the first surface of the wear pad against the outer wall of the inner section of the boom while preventing the wear pad from being displaced in a plane normal to the axis of rotation of the stud.
Each rigid plate serves to apply a compressive force evenly over the surface of the wear pad in contact with the inner section of the boom as well as to withstand the shear forces on the wear pad as the sections of the boom slide relative to one another.
Each rigid plate may be bonded in any suitable manner to the second side of the wear pad but to simplify manufacture it may conveniently be an interference fit in a recess formed in the second side of the wear pad.
In some embodiments of the invention, the mating formations comprise a circular hole in the rigid plate and a cylindrical spigot, or dog, on the end of the stud.
Advantageously, the area of the first side of the wear pad capable of contacting the outer surface of the inner section of the boom is substantially equal to the area bounded by the lateral edges of the wear pad. Thus, unlike the annular contact surface of the wear pad shown in FIG. 4, the contact surface of the wear pad of a preferred embodiment of the invention is continuous, thereby allowing a greater load bearing surface area for a given circumference.
In accordance with a second aspect of the invention, there is provided a wear pad for use in an assembly, comprising a body of plastics material having oppositely facing sides, wherein one side is continuous and at least one rigid plate is secured to the oppositely facing side of the body, the rigid plate being formed with a formation capable of interacting with a screw threaded stud to prevent the wear pad from moving in a plane normal to the axis of the stud.
Preferably, two rigid plates are secured to the oppositely facing side of the body and each is secured to the body by being an interference fit in a respective recess formed in the oppositely facing side of the body.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described further, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is, as earlier described, a section through a boom fitted with four known wear pad assemblies,
FIGS. 2, 3 and 4 are, as previously described, plan views of a mounting plate, a shim and a wear pad, respectively, of one of the wear pad assemblies shown in FIG. 1,
FIG. 5 is a view similar to that of FIG. 1 showing an embodiment of the invention, and
FIG. 6 is an exploded view of the wear pad employed in the embodiment of FIG. 6.
 DETAILED DESCRIPTION OF THE DRAWINGS
In FIG. 5, the inner section 14 is supported within the outer section 12 of the boom 10 by means of two wear pad assemblies arranged one beneath and one above the inner section 12. Each wear pad assembly comprises a wear pad 116 as shown in exploded view in FIG. 6. Each wear pad 116 comprises a body 116 a made of a suitable material, such as nylon, having a hardness lower than that of the inner section 14 of the boom 10. The body 116 a has a first surface 116 b facing the inner section 14 and a second surface 116 c facing the outer section 12. The first surface 116 b is a flat continuous surface while the second surface 116 c is formed with two circular recesses 116 d each of which received a respective rigid plate 118 having central cylindrical hole 119. The rigid plates 118 are secured to the body 116 by virtue of being an interference fit in the recesses 116 d.
Two studs 120 are screw threaded into the outer section 12 of the boom in alignment with the holes 119 in the rigid plates 118. As an alternative, the studs 120 may be screwed into a mounting plate, similar to the previously described mounting plate 18 that is itself secured to the outer section 12 of the boom 10. The ends of the studs 120 are formed with a cylindrical spigot 121, or dog, that fits within, and is free to rotate relative to, the hole 119 in the rigid plate 118. Each stud 120 is formed with a non-circular recess 125, to receive a drive implement, such as an Allen key, to apply torque to the stud. In this way, the stud can be turned to urge the wear pad 116 against the outer surface of the inner section 14 of the boom 10. Once the position of the wear pad 116 has been set, the stud is prevented from rotating by tightening a lock nut 122 against the outer surface of the outer section 12 of the boom 10. A washer 124 is inserted between the lock nut 122 and the outer section 12 of the boom.
The assemblies described by reference to FIGS. 5 and 6 are adjustable without the need for them to be dismantled, without the need to stock shims of different of sizes and without the need for special equipment to take up the weight of the inner section as shims are being added or replaced. This makes for easier installation and maintenance thereby also reducing cost. A further advantage is that a larger area of the wear pad is in contact with outer surface of the inner section of the boom providing better support and longer lasting wear pads.

Claims (9)

The invention claimed is:
1. A wear pad assembly for mounting between an inner and an outer section of a telescopic boom, comprising:
a wear pad having a continuous first side having an area substantially equal to an area bounded by lateral edges of the wear pad, the first side configured for contacting an outer wall of an inner section of the boom, and a second side facing an inner wall of an outer section of the boom,
at least one plate is secured to the second side of the wear pad so as not to be movable relative to the wear pad, wherein the at least one plate is secured by an interference fit in a recess formed in the second side of the wear pad; and
a stud in screw-threaded engagement with the outer section of the boom or a member secured to the outer section of the boom is associated with said at least one plate, an end of stud and the associated said at least one plate having mating formations to enable the stud to urge the first surface of the wear pad against the outer wall of the inner section of the boom while preventing the wear pad from being displaced in a plane normal to the axis of rotation of the stud.
2. A wear pad assembly as claimed in claim 1, wherein the mating formations comprising a circular hole in said at least one plate and a cylindrical spigot on the end of the stud.
3. A wear pad assembly as claimed in claim 1, wherein a lock nut is provided for preventing rotation of each stud relative to the outer section of the boom.
4. A wear pad assembly as claimed in claim 3, wherein a washer is provided between the lock nut and the outer section of the boom or the member secured to the outer section of the boom.
5. A wear pad assembly as claimed in claim 1, wherein the end of each stud remote from the associated wear pad is formed with a non-circular recess for receiving a drive key.
6. A wear pad for mounting between an inner and an outer section of a telescopic boom, comprising:
a body of plastic material having a first side and a second side facing opposite the first side, wherein one of the first and second sides is continuous and at least one plate is secured to the other of the first and second sides of the body, the at least one plate being formed with a formation capable of interacting with a screw threaded stud to prevent the wear pad from moving in a plane normal to the axis of the stud
wherein the said at least one plate is two plates secured to the other of the first and second sides of the body.
7. A wear pad as claimed in claim 6 wherein the plates are each secured to the body by being an interference fit in a respective recess formed in the other of the first and second sides of the body.
8. A wear pad as claimed in claim 6, wherein the formation in each plate comprises a cylindrical bole for receiving a cylindrical spigot formed on the end of an associated stud.
9. A wear pad assembly for mounting between an inner and an outer section of a telescopic boom, comprising:
a wear pad having a continuous first side for contacting an outer wall of an inner section of the boom, and a second side facing an inner wall of an outer section of the boom,
at least one plate is secured to the second side of the wear pad so as not to be movable relative to the wear pad, wherein the at least one plate is secured by an interference fit in a recess formed in the second side of the wear pad; and
a stud in screw-threaded engagement with the outer section of the boom or a member secured to the outer section of the boom is associated with said at least one plate, an end of stud and the associated said at least one plate having mating formations to enable the stud to urge the first surface of the wear pad against the outer wall of the inner section of the boom while preventing the wear pad from being displaced in a plane normal to the axis of rotation of the stud,
wherein said at least one plate comprises two plates that are secured to the second side of the wear pad.
US14/894,603 2013-05-31 2014-05-30 Adjustable wear pad assembly for a telescopic boom Active US9950911B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMO2013A0158 2013-05-31
ITMO2013A000158 2013-05-31
IT000158A ITMO20130158A1 (en) 2013-05-31 2013-05-31 ADJUSTABLE ANTI-WEAR DEVICE FOR A TELESCOPIC ARM.
PCT/EP2014/061282 WO2014191561A1 (en) 2013-05-31 2014-05-30 Adjustable wear pad assembly for a telescopic boom

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US20160130119A1 US20160130119A1 (en) 2016-05-12
US9950911B2 true US9950911B2 (en) 2018-04-24

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US (1) US9950911B2 (en)
EP (1) EP3003954A1 (en)
BR (1) BR112015029925A2 (en)
IT (1) ITMO20130158A1 (en)
WO (1) WO2014191561A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11041526B1 (en) 2020-07-25 2021-06-22 Zoomlion Heavy Industry NA, Inc Adjustable wear pad
US11278757B2 (en) * 2017-10-04 2022-03-22 Arsenal Strength Llc Low-friction slider insert for sliding tubes
US20220412398A1 (en) * 2012-08-23 2022-12-29 The Heil Co. Telescopic arm for a refuse vehicle
US12122647B2 (en) 2021-08-13 2024-10-22 Caterpillar Inc. Wear pad assembly and method for adjusting

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Publication number Priority date Publication date Assignee Title
EA034299B1 (en) * 2014-10-24 2020-01-27 СиАйДжей ИНЖИНИРД ПТИ ЛТД Boom assembly (variants) and wear pad assembly for use with a boom assembly (variants)
US10710848B2 (en) 2017-11-17 2020-07-14 Pettibone/Traverse Lift, Llc Wearpad and wearpad housing arrangement for a telescopic boom assembly
DE202020002227U1 (en) * 2020-05-20 2020-06-17 Siemens Aktiengesellschaft Telescope with slide guide
US11111957B1 (en) 2020-07-22 2021-09-07 Zoomlion Heavy Industry Na, Inc. Wear pad
GB2620454B (en) * 2022-07-08 2024-11-27 Caterpillar Inc Wear pad assembly
GB2620451B (en) * 2022-07-08 2024-10-23 Caterpillar Inc Wear pad assembly

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JPH10101293A (en) 1996-09-26 1998-04-21 Komatsu Mec Corp Slide pad device of boom
JPH11130378A (en) 1997-10-29 1999-05-18 Tadano Ltd Telescopic boom supporting structure for crane
US20020145278A1 (en) 2001-03-24 2002-10-10 Hulse Edward William Wear pad
US6499612B1 (en) 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
EP1555237A2 (en) 2004-01-16 2005-07-20 MANITOU COSTRUZIONI INDUSTRIALI S.r.l. A telescopic arm for a lift truck
EP1982948A2 (en) 2007-04-18 2008-10-22 Kobelco Cranes Co., Ltd. Sliding pad for a jib
WO2008130403A1 (en) 2007-04-19 2008-10-30 Deere & Company Remotely adjustable wear pad for an extendable boom
US8152086B2 (en) 2007-07-10 2012-04-10 Metso Minerals (Wear Protection) Ab Wear lining element and an arrangement for the attachment of such
CN202272660U (en) 2011-09-21 2012-06-13 常德大汉专用汽车有限公司 Crane boom side clearance adjusting device
CN202297059U (en) 2011-08-22 2012-07-04 徐州重型机械有限公司 Telescopic arm and sliding block mechanism thereof
US8801354B2 (en) 2011-03-30 2014-08-12 Terex South Dakota, Inc. Wearpad arrangement

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Publication number Priority date Publication date Assignee Title
US3537762A (en) * 1967-05-26 1970-11-03 Alois Lodige Guide system with precision adjustment for telescopic components
US3719403A (en) 1970-11-17 1973-03-06 Kidde & Co Walter Crane boom having wear pads
US3952466A (en) 1974-08-08 1976-04-27 Walter Kidde & Company, Inc. Spring-loaded wear pads for crane booms
US4045936A (en) 1976-04-26 1977-09-06 Bucyrus-Erie Company Telescopic boom with sections of beam and truss construction
JPS58165050U (en) 1982-04-24 1983-11-02 株式会社クボタ Shovel work arm
EP0747532A1 (en) * 1995-06-09 1996-12-11 Société GSR Marking apparatus for roads or the like
JPH10101293A (en) 1996-09-26 1998-04-21 Komatsu Mec Corp Slide pad device of boom
JPH11130378A (en) 1997-10-29 1999-05-18 Tadano Ltd Telescopic boom supporting structure for crane
US20020145278A1 (en) 2001-03-24 2002-10-10 Hulse Edward William Wear pad
US6499612B1 (en) 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
EP1555237A2 (en) 2004-01-16 2005-07-20 MANITOU COSTRUZIONI INDUSTRIALI S.r.l. A telescopic arm for a lift truck
EP1982948A2 (en) 2007-04-18 2008-10-22 Kobelco Cranes Co., Ltd. Sliding pad for a jib
WO2008130403A1 (en) 2007-04-19 2008-10-30 Deere & Company Remotely adjustable wear pad for an extendable boom
US8152086B2 (en) 2007-07-10 2012-04-10 Metso Minerals (Wear Protection) Ab Wear lining element and an arrangement for the attachment of such
US8801354B2 (en) 2011-03-30 2014-08-12 Terex South Dakota, Inc. Wearpad arrangement
CN202297059U (en) 2011-08-22 2012-07-04 徐州重型机械有限公司 Telescopic arm and sliding block mechanism thereof
CN202272660U (en) 2011-09-21 2012-06-13 常德大汉专用汽车有限公司 Crane boom side clearance adjusting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220412398A1 (en) * 2012-08-23 2022-12-29 The Heil Co. Telescopic arm for a refuse vehicle
US11933352B2 (en) * 2012-08-23 2024-03-19 The Heil Company Telescopic arm for a refuse vehicle
US11278757B2 (en) * 2017-10-04 2022-03-22 Arsenal Strength Llc Low-friction slider insert for sliding tubes
US11041526B1 (en) 2020-07-25 2021-06-22 Zoomlion Heavy Industry NA, Inc Adjustable wear pad
US12122647B2 (en) 2021-08-13 2024-10-22 Caterpillar Inc. Wear pad assembly and method for adjusting

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BR112015029925A2 (en) 2017-07-25
US20160130119A1 (en) 2016-05-12
WO2014191561A1 (en) 2014-12-04
ITMO20130158A1 (en) 2014-12-01
EP3003954A1 (en) 2016-04-13

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